Induction motor



Jan. 3, 1928.

P. F. SHIVERS INDUCTION MOTOR Filed Aprii 9, 1925 Paul 5/111 626',

Patented Jan. 3, 1928.

UNITED STATES PATENT OFFICE.

PAUL F. SHIVERS, 0F W'ABASH, INDIANA, ASSIGNOR TO THE HONEYWELL HEATINGSPECIALTIES COMPANY, OF WALBASH, INDIANA, A CORPORATION OF INDIANA.

INDUCTION MOTOR.

Application filed April 9, 1925. Serial No. 21,774.

My invention relates to improvements in field magnet cores designedparticularly for use in connection with alternating current motor".

One of the objects of my invention is to provide a field magnet corewhich will permit the easy winding of the cores.

A further object of my invention to provide a laminated core whereineach pole piece may be separately wound and then assembled into acompleted "core.

For the purpose of disclosing my invention. I have illustrated onembodiment thereof in the accompanying drawings in which Fig. 1 is aperspective View of assen'ibled field magnet core embodying my inventionthe winding being left 011 for clearness of illustration Fig. 2 is aperspective view of one of the segments thereof, and

Fig. 3 is a i'ront'elevation of one of the segments of one lamination.

In the embodiment-of the invention illustrated the lield magnet core asshown comprises a series of laminations laid together in the usualmanner. The magnet is preferably cylimlrical in shape and eachlamination comprises four quadrants l which are T shaped, the stem 2 olthe T forming a pole piece and being widened at its bottom as at 3 andthe top being rounded as at -lso that when the quadrants are assembledthey will form a substantiall circular laminationprovided with fourradially extending pole pieces, the stems 2 forming the pole pieces anddue to their widening at 3 being arranged to contact with the adjacentpole pieces, space however being provided as at 5 to accommodate thewindings. Each of the pole pieces or 40 stems is slotted at (3 toprovide means for accommodating the Winding of a shading coil.

In assembly, a series of laminations forming the completed quadrants ofthe core are assembled, being held together by bolts or rods 7 extendinthrough openings in the heads of the T. The quadrants are then wound andafter winding are assembled to form the completed core. This manner ofconstruction permits ot' the winding of. each pole piece separatelythereby greatly facilitating the winding of the core.

I claim as my invention:

A field magnet composed of a circumt'erential series of laminatedsections each lamination of each section having a; pole stem having acireumferentially flared inner pole end and a eircumt'erentially flaredouter end, the tips of the outer end being radially sepa- 0 rated fromthe tips of the pole end and substantially circumferentially extendedto. abut the tips of lan'iinations of adjacent. sections, and the. tipsof the pole-end being substantially circumt'erentially extended to lieclosely adjacent the tips of the lamimltions ol the pole ends ofadjacent sections.

In witness whereof, I, PAUL l b'invnus, have hereunto set my hand at\Vabash. Indiana, this 6th day of April, A. D. one thousand nine hundredand twenty-live.

PAUL F. SHIVERS.

